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Creating Real Time topology in Apache Storm is amazing

Hiding away all the complexities of running nodes (hidden by zookeeper) and providing parallelism for Bolts (units of work in Storm) , as well as creating new Spouts (units of data steam, e.g. redis data, twitter stream or anything you want) allows you to focus on your real time product.

Once the bolt processes a string , adding a counter to it and pushing it to redis topic (using pub/sub).

On the other end, Web app is using d3 to grab all the content coming from a stream (simple python client connected to redis emits data)